diff --git a/pkgs/development/libraries/gnome-sharp/default.nix b/pkgs/development/libraries/gnome-sharp/default.nix
index f2393a23dfe..5e525ad46af 100644
--- a/pkgs/development/libraries/gnome-sharp/default.nix
+++ b/pkgs/development/libraries/gnome-sharp/default.nix
@@ -27,6 +27,8 @@ stdenv.mkDerivation rec {
   buildInputs = [ gtk2 mono gtk-sharp-2_0 ]
   ++ (with gnome2; [ libart_lgpl gnome_vfs libgnome libgnomecanvas libgnomeui ]);
 
+  patches = [ ./fix-mono-path.patch ];
+
   preConfigure = ''
     ./bootstrap-${lib.versions.majorMinor version}
   '';
diff --git a/pkgs/development/libraries/gnome-sharp/fix-mono-path.patch b/pkgs/development/libraries/gnome-sharp/fix-mono-path.patch
new file mode 100644
index 00000000000..706f119c8ba
--- /dev/null
+++ b/pkgs/development/libraries/gnome-sharp/fix-mono-path.patch
@@ -0,0 +1,13 @@
+diff --git a/sample/gconf/Makefile.am b/sample/gconf/Makefile.am
+index a0ee802..8260694 100644
+--- a/sample/gconf/Makefile.am
++++ b/sample/gconf/Makefile.am
+@@ -22,7 +22,7 @@ sample.exe: $(SCHEMA) $(srcdir)/sample.glade $(FILES) $(ASSEMBLIES)
+	$(CSC) /out:sample.exe $(FILES) $(REFERENCES) $(RESOURCES)
+ 
+ Settings.cs: $(SCHEMA)
+-	MONO_PATH=$(top_builddir)/gconf/GConf/gconf-sharp.dll:${MONO_PATH} $(RUNTIME) $(GCONFDIR)/tools/gconfsharp-schemagen.exe Sample $(SCHEMA) > Settings.cs
++	MONO_PATH=$(top_builddir)/gconf/GConf/:${MONO_PATH} $(RUNTIME) $(GCONFDIR)/tools/gconfsharp-schemagen.exe Sample $(SCHEMA) > Settings.cs
+ 
+ CLEANFILES = sample.exe Settings.cs
+
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index f5b089be81b..a4c800839e3 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -11019,7 +11019,7 @@ in
 
   gdk-pixbuf = callPackage ../development/libraries/gdk-pixbuf { };
 
-  gnome-sharp = callPackage ../development/libraries/gnome-sharp { mono = mono4; };
+  gnome-sharp = callPackage ../development/libraries/gnome-sharp { };
 
   gnome-menus = callPackage ../development/libraries/gnome-menus { };